I'm trying to convert bignumbers(big.Int or even better big.Rat ) to Hex values.
I'm always having issue converting number when they are negative 0xff..xx or Fixed numbers.
Is there a way to do that ?
Not sure what kind of issues are you having, but big.Int, big.Float and big.Rat implement the fmt.Formatter interface, you can use the printf family with the %x %X to convert to hexadecimal string representation, example:
package main
import (
"fmt"
"math/big"
)
func toHexInt(n *big.Int) string {
return fmt.Sprintf("%x", n) // or %X or upper case
}
func toHexRat(n *big.Rat) string {
return fmt.Sprintf("%x", n) // or %X or upper case
}
func main() {
a := big.NewInt(-59)
b := big.NewInt(59)
fmt.Printf("negative int lower case: %x
", a)
fmt.Printf("negative int upper case: %X
", a) // %X or upper case
fmt.Println("using Int function:", toHexInt(b))
f := big.NewRat(3, 4) // fraction: 3/4
fmt.Printf("rational lower case: %x
", f)
fmt.Printf("rational lower case: %X
", f)
fmt.Println("using Rat function:", toHexRat(f))
}